What is Mass Effect Andromeda about?

Mass Effect: Andromeda takes players far beyond the Milky Way to the uncharted Andromeda galaxy where a new cast of characters, led by Ryder, will fight for a new home for humanity. Playing as one of the Ryder siblings in the role of the Pathfinder, players will lead a squad of highly-trained explorers as they search for and discover new worlds, alien races and threats.